I would use in coot: calculate - model/fit/refine - add alt conf. This should generate a correctly defined alternative water. Good luck! Herman
________________________________ From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of arka chakraborty Sent: Wednesday, March 07, 2012 2:21 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] setting occupancy for disordered water Hi all, I am having a structure where there is a disordered water .I have fixed one water into the density, yet there is a positive density about 1.6 ang away. I want to put in another water and attribute 0.50 occupancy to each of the the waters while attributing them to one water in reality. I would like to know how to modify the pdb so that phenix.refine accepts it. Thanks in advance, Regards, ARKO -- ARKA CHAKRABORTY CAS in Crystallography and Biophysics University of Madras Chennai,India